Improvement in saw-filing machine



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HIMSELF AND GLMAN T. WHEELER, OF THE SAME PLACE.

Lawa 12mm No. 90,207, am May 18, 1869.

DWPROVEMENT IN SAW-FILING MACHINE.

The Schedule referred to in these Letters Patent and making part of the same.

To afllwhom it may concern; y

Be it known that l, ALBERT THOMPSON, ofltidgeway, Elk county, Pennsylvania, have invented a new and improved Saw-Filing Machine; and I do hereby' dclelare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification.

This invention relates to a new and useful machine for filing saws, more especially designed for filing circular saws used in sawingboards and other descrip- Similar' letters of reference indicate corresponding parts.

A is a timber, or portion of the mill-frame, from which the saw-liling machine is supported.

B is the frame, which is attached to the timber A by means of a shaft and hangers, as seen at G D in the drawing, and which supports the gearing and the operating-parts of themachine.

, The machine is propelled by revolving the shaft E by means of thc pulley F, by hand or otherwise, and Aits weight, when attached to the saw, is supported, in

part, by pulley and cord, as seen.

Gis the driving-gear wheel on the shaft E, which meshes into the gear-wheel H on the shaft l.

J represents a fiat movable plate or bar, which is supported, by the frame on a central journal or trunnion, It, (sce 2,) and by the arm L, (by which it is connected with the shaft I by a box,) so that it is allowed to oscillate, or be turned from a horizontal to an i desired position to place the iile at the proper angie with the saw to give a shear. o1' bevel to the side of the tooth when it is desired.

The trunnion It, it will be seen, is directly central with the saw-line, so that the shear or bevel given to the edge of the tooth will be uniform throughout the saw.

The plate J, by which the position ofthe le is governed, is held in any desired position by means ofthe disk or index' m, which lis rigidly attached to the frame B.

N is a lever att-ached to the plate J, having a lspringcatch upon -its side, which, as the lever is carried over the edge of the disk, by elevating or depressing the end ofthe plate J, engages with slots ou the edge of the disk, and thereby holds the plate VJ and the file at any desired angle.

O represents a rod, which is attached to the plate J by boxes, so that while it is allowed to have a partial revolving motion, it is given a longitudinal motion by means of a crank-pin on the back ofthe gear-wheel H, and the pitman P, which connects with a crosshead, q, which cross-head'is. attached to the rod o.

R R represent arms on the rod o.

S is a rod, which passes through the ends of the arms 1t loosely, so that itmay turn therein.

rT T T represent arms ou the rod S. Through the ends of the arms T T passes the rod U.

The ile V-is connected with this rod at one end, as

seen at w, and at the other endjit is attached to the short section of a shaft, as seen at z.

The tile is held in slots in the ends of these shafts, by means of hollow screwnuts y y. Y

These shafts U and :v are allowed to turn inthe arms T T, so that the tile V may be set at any angle, not-only to fit the edge of the saw-tooth, but to give the right hook to the tooth. I r

`This latter position is given by partially rotating the le, and holding it in the desired position by means of an arm, z, on the adjustable collar a, and spring-barb on the rod u.

The ends of this bar b, and the end of the arm z are bevelled on one side, (the former being seen plainly in hg. 2,) while the bar, as it extends from the rod, is made to spring a little, so that when the rod is turned upward, it will revolve until the ends of the bar and the arm come in contact, when'the rod and file will stop, thus holding the ijle in the required position for givinga uniform hook to the ends of the teeth.

The cnt of the tile is reversed on its sides, so that in being` moved over the saw, it cuts or acts upon the saw on one tooth in moving to the left, operating on Yform.

It will be seen that the arm and bar are so arranged that the sides of the tile may be reversed by turning the rod down, without altering the adjustable collar a.

c is a hand-lever, which has its fulcrum on the rod o, by which the file is pressed on ,to the saw. It is raised by a spiral spring, c, as seen in g. 2.

The plate J is operated to give the proper bevel or shear without stopping the motion of' the tile.

'lhe mechanism for holding the saw steady, -and for turning it as the tiling-process progresses, is attached ,forward from it, as seen in fig. 3.

2 and 3. v

d represents a "plate, which is securely fastened to the front of the frame B, and drops down and projects ee' are two friction-rolls, .which are supported on this plate on suitable arbors.

The roll e Yis attached to a stand, which is adjustable on the plate d, by means of a slot in the plate and the crank-screw f. The stand oi' the roll e is stationary.

Any required ainount of friction on the saw is ob tained by turning up the screw j'. Y Y Upon the'arhor of the roll e there is a small bevelwheel, y. h is another bevel-wheel which meshes into it. The latter wheel is supported on a shaft which carries a ratchet-wheel,

j is -a lever, whose ful'crum is on the shaft of the wheel h.

When the end of the lever j is depressed, the pawl on the lever engages with the ratchet-wheel, and the shaft with the rolls is revolved, and the saw is alsorevolved or moved as much as may be desired.

hen the lever j is raised, the ratchet and pawl do not act on the shaft.

As before stated, the whole machine is hung from the timberA, (which may be partof atemporary frame, or a part of the millframe,) .so that it may be swung forward and attached to the saw, as seen in the drawing, and so that thelsaw (which is marked A in the drawing) may beA led without removing it from its arbor, thus vgreatly facilitating the operation of sharpening the saw, besides giving a uniform/nook and shear to the teeth.

I, claim as new, and Patent- 1. Hanging the sawfling machine on a frame, or othenixture, as described, so that it can be swung to and adjusted on a circular saw, Without removing the saw from its arbor1 substantially'A as herein shown and described, and for the purposes 'set forth.

2. The plate J, carrying the filing-mechanism, when supported by the central journal k, and the arm L hung upon the shaft I, and adapted for turning the le desire to secure by 'Letters to an angle otherthan a right Iangle to the saw, by

means of the graduated disk M and spring-.catch leve*L N, all arranged and operating as herein shown and de'- scribed.

3, lhe laterally-adjustable roll e, and the rolle', having fixed bearings, when operated by means ofthe gear-wheels g h, ratchet-wheel i, and paw1-leverj, and arranged upon the plate (l, suspended from the frame B, as herein described, for the purpose specified.

4. Reversing and stopping the file, and holding it in any desired position, by means Aof the adjustable collar a', arm z, and spring-bar b, as described.

5. In combination with the movable plate J, the disk or index m, with the catch-lever N, substantially as and for the purposes herein shown and described. ALBERT THOMPSON. Witnesses:

FRANK BLOCKLEY, ALEX. F. lRoBnR'rs. 

